Dwayne "The Rock" Johnson and Lauren Hashian Welcome Baby Daughter

Kate Middleton and Prince William aren't the only famous people who welcomed a baby on Monday. Congratulations are also in order for Dwayne "The Rock" Johnson and Lauren Hashian, whose family got one member bigger with the arrival of their new baby daughter, Tiana Gia Johnson, on April 23.

On Monday, Hashian gave birth to the couple's second daughter together (Johnson's third daughter), and the actor commemorated the happy event with a post on Instagram showing himself holding the newborn.

"Skin to skin. Our mana. Blessed and proud to bring another strong girl into this world," he wrote in the caption. "Tiana Gia Johnson came into this world like a force of nature and Mama @laurenhashianofficial labored and delivered like a true rockstar. I was raised and surrounded by strong, loving women all my life, but after participating in baby Tia's delivery, it's hard to express the new level of love, respect, and admiration I have for @laurenhashianofficial and all mamas and women out there."

Johnson also took the opportunity to dole out some advice to other dads-to-be. "Word to the wise, gentlemen, it's critical to be by your lady's head when she's delivering, being as supportive as you can [...] holding hands, holding legs, whatever you can do," he wrote. "But, if you really want to understand the single most powerful and primal moment life will ever offer[—]watch your child being born. [It's] a [life-changer] and the respect and admiration you have for a woman will forever be boundless."

He wrapped up the sweet message with a promise to his new daughter. "And to my third and youngest daughter, Tiana Gia[—]like I did when your two older sisters Simone Alexandra and Jasmine Lia were born, you have my word, I'll love, protect, guide, and make ya laugh for the rest of my life," he wrote. "Your crazy dad has many responsibilities and wears many hats in this big ol' world, but being your dad will always be the one I'm most proud to wear. Oh and one more thing [...] you're gonna love rollin' in daddy's pick up truck. #TianaGiaJohnson🌺#3rdDaughter #BlessesAndGratefulMan."